If you have recent back up of your data and it is independent then it might be easier to wipe the drive completely, reinstall Windows and restore your back up.If you have an image of the hard drive and a more recent back up then that is even better because you can start with wiping the drive, restoring the drive image, and then the more recent back up.If you do not have a recent back up then keep an eye out here for more suggestions.

The information on Computing.Net is the opinions of its users. Such
opinions may not be accurate and they are to be used at your own risk.
Computing.Net cannot verify the validity of the statements made on this
site. Computing.Net and Compnet Ventures, LLC hereby disclaim all responsibility
and liability for the content of Computing.Net and its accuracy.